ANS1017E (RC-50) Session rejected: TCP/IP connection failure

Hello,

I have TDP 3.2.04 on AIX 4.3.3.

Last night I got the following error:

ANS1017E (RC-50)  Session rejected: TCP/IP connection failure
.
.
.
BKI9001E: Internal error: new Message_Block failed.

BKI9001E: Internal error: new Message_Block failed.
BKI1208E: The object '/oracle/P02/sapdata10/btabi_6/btabi.data6' will be 
retried [2].
BKI1208E: The object '/oracle/P02/sapdata16/btabd_21/btabd.data21' will be 
retried [2].
BKI1208E: The object '/oracle/P02/sapdata4/clud_5/clud.data5' will be retried 
[2].
BKI0027I: Time: 08/15/2002 21:59:53 Object: 55 of 122 in process: 
/oracle/P02/sapdata10/btabi_6/btabi.data6 Size: 2039.008 MB, MGMNT-CLASS: 
SAP_PRODP_D_DY_D30, TSM-Server: ADSM .
BKI0027I: Time: 08/15/2002 21:59:53 Object: 56 of 122 in process: 
/oracle/P02/sapdata16/btabd_21/btabd.data21 Size: 2000.008 MB, MGMNT-CLASS: 
SAP_PRODP_D_DY_D30, TSM-Server: ADSM .
BKI0027I: Time: 08/15/2002 21:59:53 Object: 57 of 122 in process: 
/oracle/P02/sapdata4/clud_5/clud.data5 Size: 360.008 MB, MGMNT-CLASS: 
SAP_PRODP_D_DY_D30, TSM-Server: ADSM .
BR233E Backup utility has reported an error while saving file 
/oracle/P02/sapdata10/btabi_6/btabi.data6
BR233E Backup utility has reported an error while saving file 
/oracle/P02/sapdata12/btabd_40/btabd.data40
.
.
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I know that we had some problems with our network in the last two weeks.
I think that this error is a consequence of a new network-error, but I don´t 
want to be hasty.
Is there anyone who know if this error can be a other cause???
Or have you had the same problem and it was really a network-error???

TIA
Dirk